Abstract
The opening up of mine faces causes severe alteration to the environment that must be remedied. In the case of quartz mines, the bright white colour of the mineral gives rise to a significant impact that is visible for long distances. New techniques to correct this visual impact, based on the induction of biofilms on the faces, have recently been developed in an attempt to imitate natural effects that mask the impact. Although techniques have been applied successfully in the laboratory, they must be optimized to ensure their success in the field. In the present study, the results of a randomized factorial experiment indicated that although the biofilms adhere to the faces naturally, without the use of adhesives, continued development of the film depends to a large extent on the input of nutrients. Water must also be provided with nutritional supplement to maintain the required level of moisture.
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